懂视
(2+1/(x-1)-1/1+x)÷(x-x/(1-x平方)
2024-12-04 15:08:57
=[2+1/(x-1)-1/(x+1)÷[x(x²-1)/(x+1)(x-1)+x/(x+1)(x-1)]=[2(x+1)(x-1)+x+1-x+1]/(x+1)(x-1)×(x+1)(x-1)/x³=2/x
=[2+1/(x-1)-1/(x+1)÷[x(x²-1)/(x+1)(x-1)+x/(x+1)(x-1)]=[2(x+1)(x-1)+x+1-x+1]/(x+1)(x-1)×(x+1)(x-1)/x³=2/x